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Market Segmentation Through Information

Matthew Elliott1; Andrea Galeotti2; Ae-Ran Koh3; Wenhao Li4

1 University of Cambridge · 2 London Business School · 3 Massachusetts Institute of Technology · 4 Faculty of Business and Economics, The University of Hong Kong , Pokfulam Road ,

Review of Economic Studies 2026 open access

Abstract We explore the power that precise information about consumers’ preferences grants an intermediary in shaping competition. We think of an intermediary as an information designer who chooses what information to reveal to firms, which then compete à la Bertrand in a differentiated product market. We analyse the information designs that maximize consumer and producer surplus and uncover systematic differences in how information can be used to intensify or soften competition. Our analysis demonstrates the power that users’ data can endow intermediaries with and speaks directly to current regulatory debates regarding digital marketplaces.

DOI
10.1093/restud/rdag067
Language
en
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